This is one of the species with the prettiest spination, spine are flattened, ferocious-looking with one very long (up to 7-9cm ) central spine directed upwards. The ribs are thin with very undulated or curled ridges.
E. arrigensis is a synonym of E. crispatus. The plant found in cultivation are quite variable, and the dissimilarity among seedlings spination may be considerable.
Cultivation: Easy to to care and flower. It needs regular cacti soil with good drainage. Propagation: Seeds (usually) Exposure: It likes strong sunshine but is tolerant and do well with light shade during the hot Summer months, allow to dry between watering. It should not be watered at all in winter. Frost Tolerance: does not tolerate intense or prolonged cold (hardy to -5°C if kept dry)
Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz
